imported>Cbls1911：/* 黑暗外表 */

2023-12-18T08:50:22Z

黑暗外表

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{{Planetbox begin
| name = WASP-104b
}}
{{Planetbox star
| star = WASP-104
| constellation = [[獅子座]]
}}
{{Planetbox character
| mass = ≈1.272<ref name="Exoplanet Exploration">{{Cite web|title=WASP-104b|url=https://exoplanets.nasa.gov/newworldsatlas/5158/wasp-104-b/|publisher=Exoplanet Exploration|year=2014|access-date=2018-05-18|archive-date=2019-02-18|archive-url=https://web.archive.org/web/20190218082523/https://exoplanets.nasa.gov/newworldsatlas/5158/wasp-104-b/}}</ref>
| radius = ≈1.137<ref name="Exoplanet Exploration"/>
| rotation_period = 1.8<ref name="Exoplanet Exploration"/>
}}
{{Planetbox end}}
'''WASP-104b'''是一顆環繞恆星WASP-104的[[熱木星]]型[[太陽系外行星]]。該行星被認為是已知系外行星中表面最暗者之一<ref name=Inquisitr>{{Cite web|last1=Lozovschi|first1=Alexandra|title=‘Darker Than Coal’: Researchers Find A ‘Hot Jupiter’ That Absorbs Nearly 99 Percent Of Light|url=https://www.inquisitr.com/4875067/darker-than-coal-researchers-find-a-hot-jupiter-that-absorbs-nearly-99-percent-of-light/|website=[[Inquisitr]]|date=23 April 2018|access-date=2018-05-18|archive-date=2020-11-09|archive-url=https://web.archive.org/web/20201109034510/https://www.inquisitr.com/4875067/darker-than-coal-researchers-find-a-hot-jupiter-that-absorbs-nearly-99-percent-of-light/}}</ref><ref name="New Scientist">{{Cite web|title=Distant Jupiter-like world may be the darkest planet ever found|url=https://www.newscientist.com/article/2167030-distant-jupiter-like-world-may-be-the-darkest-planet-ever-found/|publisher=[[新科學人|New Scientist]]|date=20 April 2018|access-date=2018-05-18|archive-date=2022-04-18|archive-url=https://web.archive.org/web/20220418013122/https://www.newscientist.com/article/2167030-distant-jupiter-like-world-may-be-the-darkest-planet-ever-found/}}</ref>。WASP-104b發現於2014年，當時天文學家認為該行星表面可吸收60%入射輻射；但在2018年，英國[[基爾大學 (英國)|基爾大學]]的研究指出WASP-104b濃厚大氣層中的[[鈉]]和[[鉀]]元素，因此該行星應吸收了超過97%的入射輻射<ref name=Inquisitr/>。

== 黑暗外表 ==
WASP-104b被發現的天文學家認為是已知太陽系外行星中表面最黑暗者之一<ref name=Inquisitr/><ref>{{Cite web|last1=Hignett|first1=Katherine|title=Wasp-104b: Hot Jupiter Could Be Darkest Planet Ever Discovered|url=http://www.newsweek.com/hot-jupiter-planets-dark-897448|publisher=[[新闻周刊|Newsweek]]|date=23 April 2018|access-date=2018-05-18|archive-date=2022-01-15|archive-url=https://web.archive.org/web/20220115080343/https://www.newsweek.com/hot-jupiter-planets-dark-897448}}</ref>。2018年，英國[[基爾大學 (英國)|基爾大學]]的天文學家指出WASP-104b因為濃密大氣層內存在鈉和鉀，使其可以吸收超過97%的入射輻射<ref name=Inquisitr/>，倘若如此將高於[[WASP-12b]]可以吸收94%的入射輻射<ref>{{Cite web|title=A Distant Hot Jupiter WASP-104b May Be The Most Black Planet Ever Found|url=https://upcosmos.com/most-black-planet/|website=Upcosmos.com|author=Anthony|date=24 April 2018|access-date=2018-05-18|archive-date=2018-06-23|archive-url=https://web.archive.org/web/20180623010442/https://upcosmos.com/most-black-planet/}}</ref>。一篇在[[康乃爾大學圖書館]]發表的總共6頁的論文描述WASP-104b的表面「比煤炭更黑暗」，並將該行星是為已知系外行星中反射率最低者之一<ref name=Inquisitr/><ref>{{Cite arXiv|eprint=1804.05334|last1=Močnik|first1=T|title=WASP-104b is Darker than Charcoal|last2=Hellier|first2=C|last3=Southworth|first3=J|class=astro-ph.EP|year=2018}}</ref>。目前已知系外行星只有[[TrES-2b]]的反照率低於WASP-104b<ref name=Inquisitr/>。

== 特性 ==
=== 體積、半徑與質量 ===
WASP-104b的體積與木星相當，它的質量與半徑分別是木星的1.272和1.137倍<ref name="Exoplanet Exploration"/>。WASP-104b的質量約為地球的12.5倍。該行星的低密度代表組成成分可能是壓縮氣體<ref name="Exoplanet Exploration"/>。

=== 軌道與母恆星 ===
WASP-104b是30億歲的[[恆星光譜|G8型]]恆星WASP-104旁唯一已知的系外行星。軌道週期大約2日，軌道半徑0.02918[[天文單位]]<ref name=Exoplorer/><ref name="Exoplanet Exploration"/>。WASP-104和其行星距離地球約466光年，在天球上位於[[獅子座]]<ref name="Exoplanet Exploration"/><ref name=Inquisitr/><ref name=Exoplorer>{{Cite web|title=WASP-104 b|url=http://exoplorer.org/en/exoplanets/wasp-104-b/article|website=[[Exoplanet Data Explorer]]|access-date=2018-05-18|archive-url=https://web.archive.org/web/20180424071459/http://exoplorer.org/en/exoplanets/wasp-104-b/article|archive-date=2018-04-24|dead-url=yes}}</ref>。

== 參考資料 ==
{{Reflist}}

[[Category:凌星现象]]
[[Category:熱木星]]
[[Category:獅子座]]

WASP-104b - 版本历史

imported>Cbls1911：​/* 黑暗外表 */

imported>Cbls1911：/* 黑暗外表 */